Question

Resolva as equações
7y+5-y+8=31

Answer 1

7y + 5 - y + 8 = 31
6y + 13 = 31
6y = 31 - 13
6y = 18
y = 18/6
y = 3

R.: y = 3

Answer 2

7y-y+5+8=31
6y+13=31
6y=18
y=18/6
y=3

Verificando:

7y+5-y+8=31
(7.3)+5-3+8=31
21+10=31
31=31